When you are doing a chick from behind wearing a condom. Pull out a hose or a supersoaker and fill up the condom to the size of a large balloon (make sure you hold the condom so the water can't escape). When she starts to feel uncomfortable with the pressure yell I am Incredible Hulk! After you are bored with this, pull out leaving the condom in and watch the whole thing gush water.

1) Best used when fucking a girl in the missionary pose. At anytime during intercoarse shout, i cannot stress this enough, shout "HULK SMASH" and pound her titties in as if playing whack-a-mole. Only once, we need those things.